Heating Ducts In Attic

Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.

Heating ducts in attic. The costliest are sheet metal ducts running in enclosed walls and ceilings. Use metal flex or fiber board ducts that are insulated to code. By spraying closed cell foam on the ducts before burying them in attic insulation you prevent the condensation problem. The doe s building america program recommends beds buried encapsulated ducts.

Leaks and overflows on a given floor will seep through the floors to affect everything below it including your hvac system. Draw a floor plan of your home including the location of the hvac air handling unit the existing ducts sprouting from it and the room or rooms in your basement where you would like to place new. When hvac ducts are installed in a vented attic in a dry climate bury the ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space. The remaining 2 tons of capacity is at least 1 5x oversized for the actual 1 load.

Attic hvac systems also require shorter ducts. The duct insulation should include a vapor barrier cover. The air ducts for a central hvac systems are typically located above a home in the attic or upper crawl space or underneath a home in the space between the foundation and the floor so you don t see them unless you have cause to replace them. Ductwork running along an open ceiling in the basement of a one story home is also more affordable to replace.

Roofing materials absorb the sun especially metal sheeting or shingles made from asphalt transferring heat through these surfaces into the wooden beams in your attic. An attic can get up to about 130 f in the summer and the conditioned air entering the ducts is about 55 f or so. Your hvac system will require shorter ducts. In more cases than not a 3 ton ac with the ducts in the attic has a ton or so of load that s just from the location of the ducts in the attic and the associated duct gains leakage etc.

Type of ductwork system the least expensive duct system is a radial system of flexible ducts in an attic running to ceiling grates. Heaping insulation over the ducts is fine in dry climates but can cause condensation on the duct insulation jacket in humid climates. Find hvac duct fittings at lowe s today.